Alternative methods of complex-shaped surfaces formation on gas turbine engines parts

Keywords

lock joints of gas turbine engines, broaching, electroсhemical treatment electroerosion cutting, polishing, surface quality.

Cite as

Vasyliv Ch. B., Khoma M. S., Chuchman M. R., Torba Yu. I., Podobnyi O. V., Nemanezhyn Ye. O., and Narivskyi O. E. Alternative methods of complex-shaped surfaces formation on gas turbine engines parts. Physicochemical Mechanics of Materials. 2025. 61(2), 052-056.

https://doi.org/10.15407/pcmm2025.02.052

Abstract

The development of modern constructions and new materials for gas turbine engine lock joints requires improving their manufacturing methods in order to improve and accelerate the process. Today, the leading method of manufacturing such joints is broaching. It provides high surface quality, but is expensive, energy-intensive, and it is difficult to adjust it to technological process. Mechanical (milling, grinding) and electrochemical methods which are used to reduce the processing time, are usually not effective enough due to the rapid wear of the tool. Promising results can be obtained using electrical discharge methods. They provide high machining accuracy and surface quality, but a heat-affected zone, microcracks, and residual tensile stresses appear in the surface layer. To eliminate these defects, chemical polishing is promising, which can significantly speed up the processing process and improve surface quality.

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